Unify all smtplib commands to be uppercase

Ideas
8 
class UppercaseSMTP(smtplib.SMTP):
    def putcmd(self, cmd, args=""):
        return super().putcmd(cmd.upper(), args)
Test 
import unittest
from unittest.mock import patch
import smtplib

class UppercaseSMTP(smtplib.SMTP):
    def putcmd(self, cmd, args=""):
        return super().putcmd(cmd.upper(), args)

class TestUppercaseSMTP(unittest.TestCase):
    @patch('smtplib.SMTP.putcmd')
    def test_putcmd_uppercase(self, mock_putcmd):
        smtp = UppercaseSMTP()
        smtp.putcmd("ehlo", "example.com")

        mock_putcmd.assert_called_once_with("EHLO", "example.com")

if __name__ == '__main__':
    unittest.main()